Resolution:
The trip units 3.0A, 5.0A, 6.0A, 5.0P, 6.0P, 5.0H and 6.0H require a minimum of 20% load going through the breaker to internally power the display and show data, however the back light will not be illuminated. When externally powering the trip unit with 24Vdc on terminals F1 (neg.) and F2 (pos.) the display will also show data below 20% load, and the back light will be illuminated.